Hirofumi Yamaguchi
81Patents
7h-index
67Co-inventors
75Inventor score
Filing activity: Jul 22, 1991 → Aug 9, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5609689A | Vacuum process apparaus | Emerging Cross-Sectional Technologies | 157 | Expired |
| US5232765A | Distributed constant circuit board using ceramic substrate material | Emerging Cross-Sectional Technologies | 148 | Expired |
| US6495945B2 | Piezoelectric/electrostrictive element | Chemistry; Metallurgy | 21 | Expired |
| US7576477B2 | Piezoelectric/electrostrictive porcelain composition and method of manufacturing the same | Chemistry; Metallurgy | 14 | Active |
| US7126255B2 | Piezoelectric/electrostrictive film-type device | Physics | 13 | Expired |
| US7723909B2 | Electron emitter formed of a dielectric material characterized by having high mechanical quality factor | Electricity | 11 | Active |
| US5262595A | Dielectric ceramic body including TiO.sub.2 dispersion in crystallized cordierite matrix phase, method of producing the same, and circuit board using the same | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6541895B2 | Piezoelectric/electrostrictive film element | Performing Operations; Transporting | 6 | Expired |
| US7741708B2 | Semiconductor device | Electricity | 6 | Active |
| US5556585A | Dielectric ceramic body including TIO2 dispersion in crystallized cordierite matrix phase, method of producing the same, and circuit board using the same | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6531070B1 | Piezoelectric body | Chemistry; Metallurgy | 5 | Expired |
| US7221075B2 | Piezoelectric/electrostrictive device | Electricity | 5 | Expired |
| US6919667B2 | Piezoelectric/electrostrictive film device | Electricity | 4 | Expired |
| US7911117B2 | Piezoelectric/electrostrictive body, and piezoelectric/electrostrictive element | Chemistry; Metallurgy | 4 | Active |
| US7592405B2 | Fluorine-containing photocurable composition | Chemistry; Metallurgy | 4 | Active |
| US7183694B2 | Piezoelectric/electrostrictive device | Electricity | 4 | Expired |
| US7477004B2 | Piezoelectric/electrostrictive porcelain composition, piezoelectric/electrostrictive article, and piezoelectric/electrostrictive film type element | Chemistry; Metallurgy | 4 | Active |
| US7893601B2 | (Li, Na, K)(Nb, Ta) O3 based piezoelectric material | Emerging Cross-Sectional Technologies | 4 | Active |
| US9212087B2 | Glass-ceramics composite material | Chemistry; Metallurgy | 4 | Active |
| US6448623B2 | Piezoelectric/electrostrictive film type device | Electricity | 3 | Expired |
| US7332851B2 | Piezoelectric/electrostrictive film type device and method of manufacturing the same | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6399529B1 | Electric-field-inducible deformable material | Electricity | 3 | Expired |
| US8545160B2 | Substrate transfer apparatus and substrate transfer method | Electricity | 3 | Active |
| US8467895B2 | Processing system and method for operating the same | Electricity | 3 | Active |
| US9212085B2 | Glass-ceramics composite material | Electricity | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.